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make usbh_packet->data of union type

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out: const void *
in: void *

Signed-off-by: Amir Hammad <amir.hammad@hotmail.com>
This commit is contained in:
Amir Hammad 2016-09-01 14:16:17 +02:00
parent e0fbb799bd
commit 4aa69b4eaf
7 changed files with 20 additions and 17 deletions
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9
include/driver/usbh_device_driver.h
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@ -129,7 +129,10 @@ typedef void (*usbh_packet_callback_t)(usbh_device_t *dev, usbh_packet_callback_
struct _usbh_packet {
/// pointer to data
void *data;
union {
const void *out;
void *in;
} data;
/// length of the data (up to 1023)
uint16_t datalen;
@ -234,8 +237,8 @@ void usbh_write(usbh_device_t *dev, const usbh_packet_t *packet);
/* Helper functions used by device drivers */
void device_xfer_control_read(void *data, uint16_t datalen, usbh_packet_callback_t callback, usbh_device_t *dev);
void device_xfer_control_write_setup(void *data, uint16_t datalen, usbh_packet_callback_t callback, usbh_device_t *dev);
void device_xfer_control_write_data(void *data, uint16_t datalen, usbh_packet_callback_t callback, usbh_device_t *dev);
void device_xfer_control_write_setup(const void *data, uint16_t datalen, usbh_packet_callback_t callback, usbh_device_t *dev);
void device_xfer_control_write_data(const void *data, uint16_t datalen, usbh_packet_callback_t callback, usbh_device_t *dev);
END_DECLS